CN219625672U - An online monitoring device for grounding status of traction power supply equipment - Google Patents
An online monitoring device for grounding status of traction power supply equipment Download PDFInfo
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Abstract
本实用新型公开了一种牵引供电设备接地状态在线监测装置,包括:数据采集单元、计算评估单元和交直流激励单元,数据采集单元分别与接地引下线和计算评估单元连接,被测电力设备通过接地引下线与接地网连接,交直流激励单元,交直流激励单元与接地引下线连接,用于产生直流信号或不同于工频的交流电流测试信号;当交直流激励单元产生不同于工频的交流电流测试信号时,数据采集单元用于获取接地引下线交流电位数据,当交直流激励单元产生直流信号时,数据采集单元用于获取接地引下线直流电位数据;该监测装置,通过手动切换激励(直流或交流),从而实现了设备接地电阻的监测以及接地网腐蚀的诊断,为接地网运行状态监测提供巨大支撑。
The utility model discloses an on-line monitoring device for the grounding state of traction power supply equipment, comprising: a data acquisition unit, a calculation evaluation unit and an AC/DC excitation unit, the data acquisition unit is respectively connected with the grounding down conductor and the calculation evaluation unit, and the measured power equipment The grounding down-conductor is connected to the grounding grid, the AC/DC excitation unit, and the AC-DC excitation unit is connected to the grounding down-conductor to generate a DC signal or an AC current test signal different from the power frequency; when the AC/DC excitation unit generates a different When the AC current test signal of power frequency is used, the data acquisition unit is used to obtain the AC potential data of the grounding down conductor, and when the AC and DC excitation unit generates a DC signal, the data acquisition unit is used to obtain the DC potential data of the grounding down conductor; the monitoring device , By manually switching the excitation (DC or AC), the monitoring of equipment grounding resistance and the diagnosis of grounding grid corrosion are realized, providing a huge support for the monitoring of grounding grid operation status.
Description
技术领域technical field
本实用新型涉及设备接地状态监测技术领域,具体涉及一种牵引供电设备接地状态在线监测装置。The utility model relates to the technical field of equipment grounding state monitoring, in particular to an online monitoring device for traction power supply equipment grounding state.
背景技术Background technique
牵引变电所是电气化铁路的核心设施,为保障铁路的安全运营与人员安全,所内包括牵引变压器在内的众多电气设备均进行了防雷接地处理,因此,其接地状态良好是保障电气化铁路安全运营的重要因素。由于牵引供电系统利用钢轨、大地作为主要回流通路,在正常运行时就有较大的牵引回流流过牵引变电所接地系统。而我国牵引变电所接地网一般采用普通钢材作为接地导体,近年来为提高防腐性能也开始使用镀锌钢材。但由于受到现场施工条件限制、土壤腐蚀以及牵引地回流造成的电化学腐蚀,一般在运行8至10年后就会出现比较严重的腐蚀情况,导致接地性能大大降低,严重威胁设备与人员安全。The traction substation is the core facility of the electrified railway. In order to ensure the safe operation of the railway and the safety of personnel, many electrical equipment including the traction transformer have been grounded for lightning protection. important factor in operation. Since the traction power supply system uses rails and the earth as the main return path, a large traction return current flows through the grounding system of the traction substation during normal operation. The grounding grid of traction substations in my country generally uses ordinary steel as the grounding conductor. In recent years, galvanized steel has also been used to improve anti-corrosion performance. However, due to the limitations of on-site construction conditions, soil corrosion, and electrochemical corrosion caused by traction ground backflow, severe corrosion will generally occur after 8 to 10 years of operation, resulting in a greatly reduced grounding performance, which seriously threatens the safety of equipment and personnel.
一直以来,铁路上对于牵引变电所接地系统运行状态缺乏有效的检测或评估手段,特别是针对接地网腐蚀、断线等故障的检测,主要采用停电抽样开挖的方法。这种方法带有盲目性,工作量大、速度慢,并且受现场运行条件的限制,不能准确的判断断点与腐蚀导体。同时,这种方法会造成牵引变电所的长时间停电,影响电气化铁路的正常运行。For a long time, there is no effective detection or evaluation method for the operation status of the traction substation grounding system on the railway, especially for the detection of grounding grid corrosion, disconnection and other faults, the method of power failure sampling and excavation is mainly used. This method has blindness, heavy workload, slow speed, and is limited by field operating conditions, so it cannot accurately judge breakpoints and corroded conductors. At the same time, this method will cause a long-term power outage in the traction substation, which will affect the normal operation of the electrified railway.
在中国专利申请CN107290592A中公开了一种接地网电阻在线监测系统,利用大功率异频设备在被测地网与电流极间激起回路电流,使用数据采集单元同步采集各被测电力设备与电压极之间的电压波形,通过滤波分析单元计算各设备与零电位之间的异频电压差,从而计算各设备的接地电阻。但由于地网导体腐蚀甚至断点时,接地电阻仍可能正常,因此,该系统无法实现导体腐蚀甚至断点的检测,待发现接地电阻不合格或引起事故后再大面积开挖寻找断点或腐蚀段,则较为盲目,工作量大,还影响电力系统的运行。In the Chinese patent application CN107290592A, a grounding network resistance online monitoring system is disclosed, which uses high-power different-frequency equipment to stimulate the loop current between the ground network under test and the current electrode, and uses the data acquisition unit to synchronously collect the measured power equipment and voltage. The voltage waveform between the poles is calculated by the filter analysis unit to calculate the different frequency voltage difference between each device and the zero potential, so as to calculate the grounding resistance of each device. However, when the conductor of the ground grid is corroded or even breaks, the grounding resistance may still be normal. Therefore, the system cannot realize the detection of conductor corrosion or even a breakpoint. After the grounding resistance is found to be unqualified or an accident is caused, a large-scale excavation is performed to find the breakpoint or The corrosion section is relatively blind, with a large workload, and also affects the operation of the power system.
实用新型内容Utility model content
针对上述问题,发明人提供了一种牵引供电设备接地状态在线监测装置,根据现场实测电路环境与需求,通过切换交/直流电源作为系统激励(电流测试信号)的输入,向牵引所接地网中注入相应激励,实现各设备的接地电阻监测以及接地网防雷接地所用钢材的腐蚀情况检测数据,从而确认牵引变电所的防雷接地回流通路状况,保证电气化铁路安全运营与人员安全。In view of the above problems, the inventor provides an online monitoring device for the grounding state of traction power supply equipment. According to the actual circuit environment and requirements of the site, by switching the AC/DC power supply as the input of the system excitation (current test signal) to the grounding network of the traction station Inject corresponding incentives to realize the monitoring of grounding resistance of each equipment and the corrosion detection data of the steel used for lightning protection grounding of the grounding grid, so as to confirm the condition of the lightning protection grounding return path of the traction substation, and ensure the safe operation of the electrified railway and the safety of personnel.
具体地,本实用新型是这样实现的:Specifically, the utility model is achieved in this way:
一种牵引供电设备接地状态在线监测装置,包括:An online monitoring device for grounding status of traction power supply equipment, comprising:
数据采集单元;data acquisition unit;
计算评估单元,所述数据采集单元分别与接地引下线和计算评估单元连接,被测电力设备通过接地引下线与接地网连接;A calculation and evaluation unit, the data acquisition unit is respectively connected to the grounding down-conductor and the calculation and evaluation unit, and the electric equipment under test is connected to the grounding grid through the grounding down-conductor;
交直流激励单元,所述交直流激励单元与接地引下线连接,用于产生直流信号或不同于工频的交流电流测试信号;An AC/DC excitation unit, the AC/DC excitation unit is connected to the grounding down conductor, and is used to generate a DC signal or an AC current test signal different from the power frequency;
当交直流激励单元产生不同于工频的交流电流测试信号时,所述数据采集单元用于获取接地引下线交流电位数据,并将接地引下线交流电位数据传输给计算评估单元;When the AC and DC excitation unit generates an AC current test signal different from the power frequency, the data acquisition unit is used to obtain the AC potential data of the grounding down conductor, and transmit the AC potential data of the grounding down conductor to the calculation and evaluation unit;
当交直流激励单元产生直流信号时,所述数据采集单元用于获取接地引下线直流电位数据,并将接地引下线直流电位数据传输给计算评估单元。When the AC/DC excitation unit generates a DC signal, the data acquisition unit is used to obtain the DC potential data of the grounded down conductor, and transmit the DC potential data of the grounded down conductor to the calculation and evaluation unit.
进一步地,所述交直流激励单元包括:Further, the AC/DC excitation unit includes:
直流电源;DC power supply;
变频交流电源;Frequency conversion AC power supply;
双电源切换开关,与直流电源和变频交流电源连接,用于电源切换;Dual power switch, connected with DC power supply and variable frequency AC power supply, for power switching;
限流电阻,与双电源切换开关串联。The current limiting resistor is connected in series with the dual power switch.
进一步地,所述计算评估单元包括:Further, the calculation evaluation unit includes:
数据处理模块,与所述数据采集单元连接;A data processing module connected to the data acquisition unit;
显示屏,与所述数据处理模块连接,用于显示测量的参数。The display screen is connected with the data processing module and is used for displaying measured parameters.
进一步地,所述数据采集单元通过接线夹头与接地网支路连接,且与计算评估单元数据连接。Further, the data acquisition unit is connected to the branch of the ground grid through the clamp, and is connected to the calculation and evaluation unit for data.
进一步地,所述数据采集单元为多通道数据采集单元,每一通道采集一条支路的接地引下线电位数据,所述数据采集单元与计算评估单元无线连接。Further, the data collection unit is a multi-channel data collection unit, each channel collects the grounding downconductor potential data of a branch, and the data collection unit is wirelessly connected to the calculation and evaluation unit.
进一步地,所述数据采集单元包括16个数据监测端子与4个GND端子,可实现16路电气量信号的采集。Further, the data collection unit includes 16 data monitoring terminals and 4 GND terminals, which can realize the collection of 16 electrical quantity signals.
进一步地,该牵引供电设备接地状态在线监测装置还包括箱体,所述交直流激励单元和计算评估单元集成于所述箱体内。Further, the online monitoring device for the grounding state of the traction power supply equipment further includes a box body, and the AC/DC excitation unit and the calculation evaluation unit are integrated in the box body.
本实用新型的工作原理:Working principle of the utility model:
在进行接地网电阻监测时,通过变频交流电源产生不同于工频的电流测试信号,在被测地网与电流极间激起回路电流,使用数据采集单元采集被测设备与电压极之间的电压波形,通过数据处理模块计算各设备与零电位之间的异频电压差,从而计算各设备的接地电阻,获得基础的接地网电阻监测,实现确认该牵引变电所的防雷接地回流通路实时状况。When monitoring the resistance of the grounding grid, the current test signal different from the power frequency is generated by the variable frequency AC power supply, and the loop current is excited between the ground grid under test and the current pole, and the data acquisition unit is used to collect the voltage between the equipment under test and the voltage pole. Voltage waveform, calculate the different frequency voltage difference between each equipment and zero potential through the data processing module, thereby calculate the grounding resistance of each equipment, obtain the basic grounding grid resistance monitoring, and realize the confirmation of the lightning protection grounding return circulation of the traction substation real-time road conditions.
在进行地网导体腐蚀、断点检测时,通过变频交流电源产生直流电源,检测被测接地网支路的电阻值,当检测人员发现检测到的电阻值与该支路的原始阻值相比变大,则可判断出该支路存在腐蚀或者发生断裂。When conducting ground grid conductor corrosion and breakpoint detection, a DC power supply is generated by a variable frequency AC power supply to detect the resistance value of the ground grid branch under test. When the inspector finds that the detected resistance value is compared with the original resistance value of the branch If it becomes larger, it can be judged that there is corrosion or fracture in the branch.
与现有技术相比,本实用新型的有益效果:Compared with the prior art, the utility model has the beneficial effects:
(1)本申请提供的牵引供电设备接地状态在线监测装置既可以利用交流激励进行接地特性参数的测量,还可以利用直流激励来量化辨识接地网的腐蚀状态,为接地网运行状态监测提供巨大支撑。(1) The online monitoring device for the grounding status of traction power supply equipment provided by this application can not only use AC excitation to measure grounding characteristic parameters, but also use DC excitation to quantify and identify the corrosion state of the grounding grid, providing a huge support for monitoring the operating status of the grounding grid .
(2)通过手动控制开关的方式,在交直流电源之间进行切换,产生直流信号或不同于工频的交流电流测试信号,操作简单方便。(2) Switch between AC and DC power sources by manually controlling the switch to generate DC signals or AC current test signals different from power frequency, and the operation is simple and convenient.
附图说明Description of drawings
图1为本申请中牵引供电设备接地状态在线监测装置的原理示意图;Fig. 1 is the schematic diagram of the principle of the online monitoring device for the grounding state of the traction power supply equipment in the present application;
图2为实施例1中的牵引供电设备接地状态在线监测装置使用状态示意图;Fig. 2 is a schematic diagram of the use state of the traction power supply equipment grounding state online monitoring device in embodiment 1;
图3为图2中A处的局部放大图;Fig. 3 is a partial enlarged view of place A in Fig. 2;
图4为实施例1中的牵引供电设备接地状态在线监测装置结构框图;Fig. 4 is a structural block diagram of the online monitoring device for the grounding state of the traction power supply equipment in Embodiment 1;
图5为实施例1中的交直流激励单元的结构示意图;Fig. 5 is the structural representation of the AC/DC excitation unit in Embodiment 1;
图6为实施例1中的数据采集单元的端子排列图;Fig. 6 is the terminal arrangement diagram of the data acquisition unit in embodiment 1;
图7为图2中B处的局部放大图;Fig. 7 is a partial enlarged view of place B in Fig. 2;
图8为实施例2中牵引供电设备接地状态在线监测装置使用状态示意图。Fig. 8 is a schematic diagram of the usage state of the online monitoring device for the grounding state of traction power supply equipment in Embodiment 2.
附图标记:Reference signs:
1-交直流激励单元;11-调节旋钮;2-数据采集单元;3-计算评估单元;31-显示屏;32-数据处理模块;4-接地网;41-接地引下线;5-箱体;6-导线;61-接线夹头。1-AC/DC excitation unit; 11-adjusting knob; 2-data acquisition unit; 3-calculation and evaluation unit; 31-display screen; 32-data processing module; 4-grounding grid; 41-grounding downconductor; 5-box Body; 6-wire; 61-wiring clamp.
具体实施方式Detailed ways
下面通过具体实施方式结合附图对本实用新型作进一步详细说明。The utility model will be described in further detail below through specific embodiments in conjunction with the accompanying drawings.
接地网多为扁钢、角钢或钢管横纵交错呈矩形状网络,纵横交错点为节点,接地引下线多与节点连接,节点与节点之间为一支路,若干支路组合成接地网络。The grounding grid is mostly flat steel, angle steel or steel pipes, which are criss-crossed in a rectangular network. The criss-crossing points are nodes, and the grounding down-conductors are mostly connected to the nodes. There is a branch between the nodes, and several branches are combined to form a grounding network. .
实施例1Example 1
如图1-5所示,本实施例提供了一种牵引供电设备接地状态在线监测装置,包括:交直流激励单元1、数据采集单元2和计算评估单元3,交直流激励单元1和计算评估单元3集成于箱体5内,箱体5上设有接线接口,交直流激励单元1通过接线接口和导线6与接地引下线41连接,接地引下线41一端与电气设备连接,另一端与接地网4连接,交直流激励单元1向牵引所接地网4中注入相应激励,以测量接地特性参数。在本实施例中,数据采集单元2为电压采集器,其通过导线6与接地引下线41连接,用于采集电压值。由于接地引下线41多为扁钢,为方便导线6与接地引下线41连接,因此,再导线6的端部设置接线夹头61,利用接线夹头61即可实现导线6与接地引下线41的快速连接。数据采集单元2通过数据接口与箱体5连接,在采集到电压值以后,将电压值反馈到计算评估单元3,由计算评估单元3根据现有算法计算出电阻值。As shown in Figures 1-5, this embodiment provides an online monitoring device for the grounding state of traction power supply equipment, including: AC and DC excitation unit 1, data acquisition unit 2 and calculation and evaluation unit 3, AC and DC excitation unit 1 and calculation and evaluation unit The unit 3 is integrated in the box body 5, and the box body 5 is provided with a wiring interface. The AC and DC excitation unit 1 is connected to the grounding down conductor 41 through the wiring interface and the wire 6. One end of the grounding down conductor 41 is connected to the electrical equipment, and the other end Connected with the grounding grid 4, the AC/DC excitation unit 1 injects corresponding excitation into the grounding grid 4 of the traction station to measure grounding characteristic parameters. In this embodiment, the data collection unit 2 is a voltage collector, which is connected to the ground downconductor 41 through a wire 6 for collecting voltage values. Since the grounding down conductor 41 is mostly flat steel, in order to facilitate the connection between the wire 6 and the grounding down conductor 41, the end of the wire 6 is provided with a clamp 61, and the connection between the wire 6 and the grounding conductor can be realized by using the clamp 61. Quick connect for downline 41. The data acquisition unit 2 is connected to the box body 5 through the data interface. After collecting the voltage value, the voltage value is fed back to the calculation and evaluation unit 3, and the calculation and evaluation unit 3 calculates the resistance value according to the existing algorithm.
具体地,如图5所示,交直流激励单元1包括直流电源DC、变频交流电源AC、双电源切换开关K以及限流电阻R,通过双电源切换开关K来进行直流电源DC和变频交流电源AC的切换。其分别与任意两根接地引下线41连接,已构成回路。Specifically, as shown in FIG. 5 , the AC/DC excitation unit 1 includes a DC power supply DC, a variable frequency AC power supply AC, a dual power supply switch K, and a current limiting resistor R. AC switching. They are respectively connected with any two grounding down conductors 41 to form a loop.
在进行电气设备接地电阻监测时,切换至变频交流电源AC,根据现场实测电路环境与需求,通过调节旋钮11调整变频交流电源AC输入的交流电流测试信号大小,此时数据采集单元2所测量的是各被测电力设备与电压极之间的电压波形,通过计算评估单元3计算各被测电力设备与零电位之间的异频电压差,从而计算各被测电力设备的接地电阻。When monitoring the grounding resistance of electrical equipment, switch to the variable frequency AC power supply AC, and adjust the magnitude of the AC current test signal input by the variable frequency AC power supply AC through the adjustment knob 11 according to the actual circuit environment and requirements on site. At this time, the measured by the data acquisition unit 2 It is the voltage waveform between each electric device under test and the voltage pole. The calculation and evaluation unit 3 calculates the different frequency voltage difference between each electric device under test and zero potential, thereby calculating the grounding resistance of each electric device under test.
在进行接地网腐蚀诊断时,切换至直流电源DC,此时数据采集单元2所测量的是各被测支路的电压值。其中接地网腐蚀诊断方程组为:When diagnosing the corrosion of the ground grid, switch to the direct current power supply DC, and what the data acquisition unit 2 measures at this time is the voltage value of each branch circuit under test. The grounding grid corrosion diagnostic equations are:
得到节点电压Un与支路电阻Rj的关系为:The relationship between the node voltage U n and the branch resistance R j is obtained as:
其中,支路导纳对第j支路电阻的偏导为:Among them, the partial conductance of the branch admittance to the jth branch resistance is:
数据处理求解器中求解支路电阻增大倍数的内嵌算法由CPLEX求解器、微量处理法、PSO算法等组成。其中各算法的理论方程如下:The embedded algorithm in the data processing solver to solve the multiplier of branch resistance is composed of CPLEX solver, microprocessing method, PSO algorithm and so on. The theoretical equations of each algorithm are as follows:
(1)CPLEX求解器(1) CPLEX solver
以等式(1)△U可及节点=V△Ln为求解方程,满足约束条件(4),以(5)最小为目标函数,已知可及节点电位与灵敏度矩阵,求出支路电阻增大倍数。Take the equation (1) △ U accessible node = V △ L n as the solution equation, satisfy the constraint condition (4), take the minimum of (5) as the objective function, know the potential and sensitivity matrix of the accessible node, and find the branch multiplier of resistance.
△Ln≥0,n=1,2,…b (4)△L n ≥ 0, n = 1,2,...b (4)
min||Ues-Uet||2 (5)min||U es -U et || 2 (5)
(2)微量处理法(2) micro-processing method
采用微量处理法对诊断模型进行预处理,将非线性模型分段线性化。The diagnostic model is preprocessed by microprocessing method, and the nonlinear model is piecewise linearized.
△Ue0=ks*(Ues-Uet) (6)△U e0 =k s *(U es -U et ) (6)
其中ks为微量系数,取较小的值,保证每一次迭代求解都在较小的范围内波动。Among them, k s is a trace coefficient, and a smaller value is used to ensure that each iteration solution fluctuates within a smaller range.
目标函数:Objective function:
min f(△X1,△X2,…Ω,△Xb+1)=||△Ue0-M*△X|| (7)min f(△X 1 ,△X 2 ,…Ω,△X b+1 )=||△U e0 -M*△X|| (7)
逐步迭代求解方程(53),得到△Xj,j=1,2,…b,更新节点电位U与灵敏度矩阵M。Equation (53) is solved step by step iteratively to obtain △X j , j=1, 2,...b, and the node potential U and sensitivity matrix M are updated.
Xj=Xj*(1+△Xj) (9)X j =X j *(1+△X j ) (9)
R”j=Rj*Xj (10)R” j =R j *X j (10)
迭代终止条件:Iteration termination condition:
(3)PSO算法(3) PSO algorithm
以确定性算法求出的解来确定粒子上下限范围,并将该确定解作为第一个粒子的初始位置,其余的初始位置随机设置。The upper and lower limits of the particles are determined by the solution obtained by the deterministic algorithm, and the determined solution is used as the initial position of the first particle, and the remaining initial positions are set randomly.
粒子i在第k次迭代时的适应度函数:The fitness function of particle i at the kth iteration:
粒子i在第d维的位置与速度更新规则:The position and velocity update rule of particle i in the d-th dimension:
其中:in:
当粒子触碰到下边界时,此刻粒子i的速度与位置会更新为:When the particle touches the lower boundary, the speed and position of particle i at this moment will be updated as:
当粒子碰到上边界时,粒子i速度与位置分别更新为:When the particle hits the upper boundary, the velocity and position of particle i are updated as follows:
当迭代步数k达到上限步数kmax时终止算法,此刻输出全体粒子群的粒子最优位置即最优解,根据算法所求得支路电阻增大倍数。When the number of iteration steps k reaches the upper limit number of steps k max , the algorithm is terminated. At this moment, the optimal position of the particles of the entire particle swarm is output, that is, the optimal solution, and the multiplier of branch resistance obtained by the algorithm is obtained.
需要说明的是,上述的接地电阻计算以及接地网腐蚀诊断均为现有算法,本申请不涉及对上述算法的改进。It should be noted that the above-mentioned ground resistance calculation and ground grid corrosion diagnosis are existing algorithms, and this application does not involve improvements to the above algorithms.
进一步地,数据采集单元2可采用单路电压采集器,该方式主要用于小范围的特定设备接地电阻监测或特定支路腐蚀的诊断。在针对整个接地网4或较多电气设备时,则采用多路电压采集器,优选地,如图6所示,数据采集单元2采用16路电压采集器,其包括16个数据监测端子与4个GND端子,可实现16路电气量信号的采集。Further, the data acquisition unit 2 may adopt a single-channel voltage collector, which is mainly used for monitoring the grounding resistance of a specific equipment in a small range or diagnosing corrosion of a specific branch circuit. When aiming at the whole grounding network 4 or more electrical equipment, then adopt multi-channel voltage collector, preferably, as shown in Figure 6, data acquisition unit 2 adopts 16 road voltage collectors, and it comprises 16 data monitoring terminals and 4 A GND terminal, which can realize the collection of 16 electrical quantity signals.
计算评估单元3包括:数据处理模块32和显示屏31,数据处理模块32接收到数据采集单元2采集的数据后,通过现有算法得出相应的数据,并通过显示屏31进行显示,显示屏31可显示电压波形、电阻值等数据。Calculation evaluation unit 3 comprises: data processing module 32 and display screen 31, after data processing module 32 receives the data collected by data acquisition unit 2, obtains corresponding data by existing algorithm, and displays by display screen 31, display screen 31 can display voltage waveform, resistance value and other data.
实施例2Example 2
如图8所示,本实施例中,数据采集单元2采用为多路电压采集器,数据采集单元2与无线发射器进行集成,箱体内5设有无线接收器,无线接收器与数据处理模块32连接,数据采集单元2采集的数据通过无线发射器发送到无线接收器,再由无线接收传输给数据处理模块32。As shown in Figure 8, in this embodiment, the data acquisition unit 2 is adopted as a multi-channel voltage collector, the data acquisition unit 2 is integrated with the wireless transmitter, a wireless receiver is arranged at 5 in the cabinet, and the wireless receiver and the data processing module 32 connection, the data collected by the data acquisition unit 2 is sent to the wireless receiver through the wireless transmitter, and then transmitted to the data processing module 32 by wireless reception.
以上应用了具体个例对本实用新型进行阐述,只是用于帮助理解本实用新型,并不用以限制本实用新型。对于本实用新型所属技术领域的技术人员,依据本实用新型的思想,还可以做出若干简单推演、变形或替换。The above uses specific examples to illustrate the utility model, which is only used to help understand the utility model, and is not intended to limit the utility model. For those skilled in the technical field to which the utility model belongs, some simple deduction, deformation or replacement can also be made according to the idea of the utility model.
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